Means for energizing radio apparatus



A. SENAUKE MEANS FOR ENERGI Z I NG RADI 0 APPARATUS Feb. 25, 1930.

Filed Feb. 21, 1924 INVENTOR. fixarzder 567 2 B Y ATT RNEY.

Patented Feb. 25, 1930 i UNITED STATES PATENT OFFICE ALEXANDER SENAUKE, OF NEW YORK, N. Y.

MEANS FOR ENERGIZING RADIO APPARATUS Application filed February 21, 1924. Serial N0. 694,247.

This invention relates to radio circuits or with the fuse holders 11 thereof through wires hook-ups and particularly to the provision 14 and 15, and on the free end of the electric of an apparatus adapted to be placed in circord 13 is a pull out plug 16 for a standard cuit with D. C. lighting supply and through socket of D. C. electrical supply.

'5 which said D. O. circuit passes to various Mounted in one wall of the casing 10 are electrical elements or units of a radio refour terminals or binding posts 17, 18, 19 and ceiving or broadcasting set to supply said 20. Mounted within the casing in the con elements or units with the proper electrical struction shown in Fig. 1 are four condensers energy required therefor, and the object of 21, 22, 23 and 24, a choke coil 25, resistance 10 the invention is to provide an apparatus of coil 26 and variable rheostat 27. The rheostat the class and for the purpose specified emor the operating shaft 28 thereof preferably ploying one or more choke coils or resistance projects through the casing 10 to permit of coils and condensers mounted in the circuit the operation of said rheostat. to said coil or coils whereby the D. 0. current The condensers, coils and rheostat above passing through the apparatus will beiiltered named are in the following electrical com- 65 out to eliminate or materially reduce the hum munication with the wires 14 and 15. A wire caused by commutator ripple; a further ob- 29 is coupled with the wire 14 through the ject being-to provide an apparatus of the fuse holder 11 and to the binding post or class specified by means of which the quality terminal 17, and a wire 30 is coupled with of reproduction of a radio set may be mathe wire 15 through the other fuse holder 11, terially improved; a further object being to and to one terminal of the choke coil and provide an apparatus which will eliminate the other terminal of the choke coil is coupled the necessity of using an outside aerial by with the binding post 18 through a wire 31. utilizing the electrical supply system as a The condenser 21 is shunted across the wires 25 collector of radio energy; and with these and 29 and 30. A wire 32 is connected with the other objects in view the invention consists wire 29 and extends to the condenser 24 and in an apparatus of the class described which from said condenser another wire 33 conis simple in construction and operation and nects with the resistance coil 26 approximateetficient in use and which is constructed as ly centrally thereof. r

hereinafter described and claimed. The condenser 22 is shunted across the wires The invention is fully disclosed in the fol- 31 and A wire 34 is connected with the lowing specification, of which the accompanywire 32 and to the condenser 23, from said ing drawing forms a part, in which the sepacondenser awire 35 extends to and is conrate parts of my improvement are designated nected with the binding post 20, and the 35 by suitable reference characters in each of coil of the rheostat 27 is also coupled with the views, and in which; the wire 35. The movable contact of the Fig. 1 is a diagrammatic view of one form rheostat 27 is coupled with the coil 26 through of apparatus which Iinay employ in carrying a wire 36 and another wire 37 is connected my invention into effect; with the wire 30 and the other end of the 40 Fig. 2is a view similar to Fig. 1 but showcoil 26. A wire 38 is connected with the ing a modification; and, wire 37 and to the binding post 19.

Fig. 3 is a view similar to Fig. 1 but show- The foregoing construction is specific to In carrying my invention into effect, I the drawing.but in Figs.2and3Ihave shown a 45 preferably provide a suitable box-shaped the apparatus made up in separate units container diagrammatically shown at 10 in which may be used separately or collectively. Fig. 1 of the drawing. To one side of the In Fig. 2 of the drawing the coil 25 and concontainer is secured suitable fuse holders 11 denser 22 only are employed. the condenser 2 for receiving fuses 12 and a flexible circuit 22 shunting the wires 31 and 29 which are.

50 wire cord 13 couples with the casing 10 and the equivalents of similar wires shown in ing another modification. the diagrammatic view shown in Fig. 1 of Fig. l of the drawing, which wires are connected with the binding posts 17 and 18 (Fig. 2). The fuse mountings are not diagrammatically shown in Fig. 2 but it will be understood that it is not necessary to employ the same, as the use of these fuses or fuse mountings is purely for a matter of safety.

In Fig. 3 of the drawing I have shown the coil 26 and the condensers 23 and 24 as well as the rheostat 27, and the binding posts 17, 19 and 20 are also shown. On considering Figs. 2 and 3 of the drawing, it will be apparent that certain units of the apparatus may be sub-divided or these units may be marketed separately and used separately or collectively.

The operation of the apparatus shown in Fig. 1 and also in units as shown in Figs. 2 and 3 will be readily understood from the foregoing description when taken in connection with the accompanying drawing and the following statement. The D. C. current entering the apparatus directly or through the fuse mounting members passes through the wires 29 and 30, and this circuit is shunted by the condenser 21 of medium capacity to provide for a ground connection at filament regardless of the side of a three wire D. C. system with which the plug 16 may be con nected. The circuit through the wire 30 also passes through the choke coil 25, the inductance of which may vary from approximately two henries up. The circuit through the wire 31 from the coil 25 is shunted through the wire 29 through the condenser 22 of comparatively high capacity, and this condenser constitutes part of the plate supply filter. The circuit through the wire 30 continues to the resistance coil 26 through the wire 27, and this coil is preferably highly inductive and the coil is shunted to the circuit wire 29 by wires 32 and 33 and condenser 24 therein and another condenser 23 shunts the wire 32 and the variable rheostat 27, both of the condensers 23 and 24 cooperating1 with the other filters to aid in filtering the lament supply.

The above described construction which is specific to the construction shown in Fig. 1 will operate to eliminate practically all of the hum caused by the commutator ripple in D. C. electrical supply. The construction shown in Fig. 2 shows only two of the filters employed in the construction shown in Fig. 1, and these filters will operate to accomplish the same result especially in predetermined uses of apparatus of this class wherein a high degree of filterization is not required. and this is also true of the construction shown in Fig. 3 of the drawing.

With the a paratus shown in Fig. 1 of the drawing, the hinding post 17 is coupled or in circuit with the minus filament of all of the tubes of a radio receiving set, while the binding post 20 is coupled or in circuit with the plus filament of the detector tube. The binding post 18 is coupled or in circuit with the plates of all of the tubes and the binding 0st 19 is placed in circuit with a plurality o incandescent lam s which provide non-inductive amplifier lament resistance for the radio circuit.

While I have shown in Figs. 1, 2 and 3 of the drawing one unit for connection with all of the tubes of a radio receiving set a number of these units may be employed, that is to say, any number of the coils, rheostats and condensers may be combined to constitute one unit or a series of cooperating units.

It will be understood that while I have referred to an application or use of my improvement, I am not necessarily limited in this respect, the distinctive feature of the invention residing in the provision of the filtering apparatus whereby a D. C. lighting system circuit may be utilized to supply radio receiving apparatus with all the required electric energy, such as commonly employed in the use of A, B and C batteries.

It will be apparent that while I have shown certain details of construction for carryin my invention into effect, that my improv apparatus may be used in connection with radio sets or hook-ups of any kind or class or other electrical appliances wherein it is desired to utilize D. C. electrical supply with the hum substantially eliminated therefrom, and various changes in and modifications of the construction herein shown and described may be made, within the scope of the 21p pended claim, without departing from a spirit of my invention or sacrificing its advantages.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is

In apparatus for supplying energy to a radio communication system from a direct current source, two conductors for connecting the apparatus to said source, output terminals for said apparatus connected directly to the respective conductors, an inductance coil and a resistance coil each connected at one end to one of the conductors, a third output terminal connected directly to the free end of said inductance coil, a fourth output terminal connected to the free end of said resistance coil through a variable resistance, condensers connected between the other conductor and the third and fourth output terminals, a condenser connected between said conductor and an intermediate point on the resistance coil, and a condenser connected directly between the two conductors.

In testimony that I claim the foregoing as my invention I have signed my name this 18th day of February, 1924.

ALEXANDER SENAUKE. 

